[RE-wrenches] Buck-Boost transformer to mitigate high voltage drop?

[Mac Lewis]

Yes, what current did you use to calculate that voltage drop? How big is
the PV system?

On Aug 16, 2016 11:38 AM, "Chris Mason" <cometenergysystems at gmail.com>
wrote:

> How much of the power produced will be self-consumed, how much will be
> exported?
>
> On Tue, Aug 16, 2016 at 12:16 PM, Howard Arey <scot.arey at solarcentex.com>
> wrote:
>
>> Good day,
>>
>>
>>
>> I have a potential client that has an existing 1,000 foot run from the
>> meter and transformer at the street to the home. This is 4/0 Al and quick
>> calcs show the voltage drop at over 12%. He acknowledges that the wire is
>> undersized to keep voltage at/about 240 volts (I have not measured directly
>> at the street / transformer yet).
>>
>>
>>
>> I know the wire has the necessary ampacity to carry his current service
>> needs and to carry amps from the to-be-suggested solar system.
>>
>>
>>
>> My concern is that the voltage drop will change the 240 volts at the
>> street/transformer/meter to 211ish (or will I see a higher 268’sh voltage
>> at the far house end?) at the house. The inverter will try to synch to this
>> voltage but of course this is outside of typical inverter parameters.
>>
>>
>>
>> So, instead of re-running much large wire, does anybody have experience
>> and comments about potentially using a buck-boots transformer at the home
>> to get us back to 240 volts? This would need to be service entrance sized.
>>
>>
>>
>> *Howard “Scot” Arey*
>>
>> Owner, Solar CenTex
>>
>> 254-300-1228
>>
>> scot.arey at solarcentex.com
>>
>>
>>
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>
>
> --
> Chris Mason
> NABCEP Certified Solar PV Installer™
> Solar Design Engineer
> Generac Generators Industrial technician
>
> www.cometsolar.com <http://www.cometenergysystems.com>
> 264.235.5670
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